CN108057780A - A kind of pressure changeable drawing die - Google Patents
A kind of pressure changeable drawing die Download PDFInfo
- Publication number
- CN108057780A CN108057780A CN201711364237.8A CN201711364237A CN108057780A CN 108057780 A CN108057780 A CN 108057780A CN 201711364237 A CN201711364237 A CN 201711364237A CN 108057780 A CN108057780 A CN 108057780A
- Authority
- CN
- China
- Prior art keywords
- nitrogen gas
- gas spring
- mold core
- blank holder
- upper mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 57
- 239000004744 fabric Substances 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- 239000002994 raw material Substances 0.000 description 26
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
Abstract
The present invention provides a kind of pressure changeable drawing die, including upper mold seat, die holder and blank holder, mounting groove is offered on the bottom surface of die holder, the pressure changeable pushing component that blank holder is promoted to move up is equipped in mounting groove, pressure changeable pushing component includes fixed plate, interval is connected with 3 group of first nitrogen gas spring in fixed plate, and 2 group of second nitrogen gas spring is equipped between the first nitrogen gas spring of two adjacent groups, and the first nitrogen gas spring of connection, the snorkel of the second nitrogen gas spring are additionally provided in fixed plate；Lower mold core is connected on die holder, the middle part of blank holder is equipped with slide opening, blank holder is equipped with the flanging block for enclosing and raising up around slide opening one, semi-circular recesses are offered on flanging block, rectangle mounting hole is offered on upper mold seat, upper mold core is equipped in mounting hole, upper mold core is equipped with and the matched semi-circular projection of semi-circular recesses.Solve the problems, such as that part rejection can be caused by generating trace in the appearance forming surface of part in drawing process.
Description
Technical field
The present invention relates to auto parts and components manufacture fields, and in particular to a kind of pressure changeable drawing die.
Background technology
V-type part on automobile generally use mould molding during fabrication, in order to avoid making V-type part that rebound, distortion occur,
For the processing method of drawing formula, pass through part during the cooperation of upper mold core and lower mold core after being compressed to the edge of raw material plate
Drawing and moulding.But percussion mark is generated in drawing process in part, it can see trace on surface in spraying, influence normally to make
With and perception.Trace generation position is directly affected to the compression mode at the edge of raw material plate in V-type part process, it is right
Part rejection can be caused, it is necessary to change by the compression mode at edge to trace generation position in generating trace in appearance forming surface
It is controlled, trace is made to be generated on seal face, avoided the occurrence of on the surface.
The content of the invention
For the deficiency in the presence of the prior art, the present invention provides a kind of pressure changeable drawing dies, solve drawing
Part rejection can be caused by leading to the problem of trace in the appearance forming surface of part in the process.
To achieve the above object, present invention employs following technical solutions：A kind of pressure changeable drawing die, including upper mold
Seat, die holder and blank holder offer mounting groove on the bottom surface of the die holder, be equipped with to promote in mounting groove blank holder to
The pressure changeable pushing component of upper movement, pressure changeable pushing component include fixed plate, and interval is connected with 3 group of first nitrogen in fixed plate
Spring, is equipped with 2 group of second nitrogen gas spring between the first nitrogen gas spring of two adjacent groups, and the push rod stroke on the first nitrogen gas spring is
9 times of push rod stroke on second nitrogen gas spring, be additionally provided in fixed plate the first nitrogen gas spring of connection, the second nitrogen gas spring it is logical
Tracheae；
Multiple push rods for being used for the first nitrogen gas spring are offered on the die holder, the push rod of the second nitrogen gas spring stretches out
Matching hole is connected with lower mold core in the middle part of die holder, and the cross sectional shape in the type face of lower mold core is inverted " v "；
The matched slide opening in all sides with lower mold core is offered in the middle part of the blank holder, is set on the upper surface of blank holder
There is the flanging block for enclosing and raising up around slide opening one, the semi-circular recesses of strip structure are offered on flanging block；
Rectangle mounting hole is offered on the upper mold seat, is equipped with and the matched upper mold core of lower mold core, upper mold in mounting hole
Core is equipped with and the matched semi-circular projection of semi-circular recesses.
In process, first pass through 3 group of first nitrogen gas spring the edge of raw material plate is pressed on to blank holder ejection
Between flanging block in upper mold core and blank holder, the compacted position at the edge of raw material plate is only used as prevents raw material plate at this time
Mobile effect allows raw material plate to generate the extension of material sliding, during being moved down with upper mold, blank holder,
Lower mold core is to raw material plate carry out type face shaping, and when the stroke that blank holder moves down is last 10%, 4 group of second nitrogen
Spring participates in compressing the edge of raw material plate, and skid wire, which has moved, at this time leads compacted position, makes V-type part in upper mold seat under
Pressurize is carried out under the squeezing action of die holder, avoids the generation of rebound.It first participates in compressing raw material plate by the first nitrogen gas spring
Edge compresses, in 90% stroke of compaction process, after skid wire is made to be moved to compacted position, and remaining the second nitrogen of 10% stroke
Spring also assists in the edge compression for compressing raw material plate, and V-type part is fully avoided to generate the situation of rebound.
Compared with the prior art, the present invention has the advantages that：
1st, two processes of raw material plate are compressed by the way of pressure changeable, 90% before drawing stroke in only
The edge that raw material plate is participated in using 2 group of first nitrogen gas spring is compressed, pressing force can ensure raw material plate do not occur it is mobile and
Can have makes the avoiding space that material slides to compacted position；Make 4 group of second nitrogen gas spring in last the 10% of drawing stroke
The edge for participating in raw material plate compresses, and makes the rim of entire raw material plate will not move, and material sliding will not be to extension
Exhibition, makes molding V-type part carry out pressurize shaping between upper mold core and lower mold core, prevents V-type part from generating rebound phenomenon；
2nd, the semi-circular projection that flanging block is equipped on the semicircle groove and upper mold core of strip structure coordinates in extrusion process
Bending structure is generated in the marginal position of raw material plate, raw material plate is made reliably to be compacted, avoids generating in drawing process
It is mobile.
Description of the drawings
Fig. 1 is the configuration schematic diagram of the present invention；
Fig. 2 is the structure diagram of pressure changeable pushing component of the present invention；
Fig. 3 is the assembling structure schematic diagram of upper mold seat of the present invention and upper mold core；
Fig. 4 is the assembling structure schematic diagram of die holder of the present invention and lower mold core；
Fig. 5 is the vertical view axonometric drawing of blank holder of the present invention；
Fig. 6 looks up axonometric drawing for blank holder of the present invention.
In figure, upper mold seat 1, lead 101, anticollision side plate 102, blank holder 2, slide opening 201, semi-circular recesses 202, first
Promote column 203, second promote column 204, guide groove 205, limiting plate 206, lock hook 207, die holder 3, matching hole 301, under
Mold core 4, upper mold core 5, semi-circular projection 501, slot 502, connecting hole 503, pressure changeable pushing component 6, fixed plate 601, the first nitrogen
Gas spring 602, first step 6021, the second nitrogen gas spring 603, second step 6031, snorkel 604.
Specific embodiment
The present invention is described further below in conjunction with the accompanying drawings.
As shown in Fig. 1~Fig. 6, a kind of pressure changeable drawing die of the present invention, including upper mold seat 1, die holder 3 and pressure
Flange 2 offers mounting groove on the bottom surface of the die holder 3, is equipped with to promote the change that blank holder 2 moves up in mounting groove
Pressure pushing component 6, pressure changeable pushing component 6 include fixed plate 601, and interval is connected with 3 group of first nitrogen bullet in fixed plate 601
Spring 602, the quantity of every group of first nitrogen gas spring 602 are 2, and 2 groups the are equipped between the first nitrogen gas spring of two adjacent groups 602
Two nitrogen gas springs 603, the quantity of every group of second nitrogen gas spring 603 is 2；Push rod stroke on first nitrogen gas spring 602 is
9 times of push rod stroke on two nitrogen gas springs 603,90% before drawing stroke in 3 group of first nitrogen gas spring 602 is only allowed to participate in
Work is compressed, 4 group of second nitrogen gas spring 603 is allowed to also assist in compression work in rear the 10% of drawing stroke, passes through pressure changeable
The way of propelling moves up blank holder 2 and promotes, the pressing force that the marginal position of raw material plate is made to be subject to two stages
Difference makes skid wire fully flow and leads compacted position, does not influence the surface forming result of appearance member.It is also set in fixed plate 601
There are the first nitrogen gas spring 602 of connection, the snorkel 604 of the second nitrogen gas spring 603, by snorkel 604 respectively to the first nitrogen
Nitrogen is filled in spring 602, the second nitrogen gas spring 603, it, can in order to ensure that different time sections be filled with the control of the amount of nitrogen
The first nitrogen gas spring 602, the second nitrogen gas spring 603 air inlet at set three way type solenoid valve, can pushing away to blank holder 2
Dynamic process carries out controllable adjustment.
First step 6021 is equipped on the push rod of the first nitrogen gas spring 602, is set on the push rod of the second nitrogen gas spring 603
There is second step 6031, the height of first step 6021 is more than the height of second step 6031, since the first nitrogen gas spring 602 is joined
It is most long with the time of promotion blank holder 2 and distance, ensure to enable the first nitrogen gas spring 602 reliable in entire pushing course
It is promoted, ensures the promotion dynamic balance that blank holder 2 is subject to, be equipped with and the first nitrogen gas spring 602 on the lower surface of blank holder 2
Position corresponding first promotes column 203, and the first promotion column 203 is engaged with first step 6021, so as to ensure pushing course
It is steady to carry out；During last the 10% of drawing stroke, the second nitrogen gas spring 603, which also assists in, promotes blank holder 2, in order to make the
Two nitrogen gas springs 603 in 2 contact process of blank holder with that can ensure that subsequent pressure balance is pressed on blank holder 2, in blank holder 2
Lower surface on be additionally provided with corresponding with the position of the second nitrogen gas spring 603 second and promote column 204, second promotes column 204 and the
Two steps 6031 are engaged, in entire pressure changeable pushing component 6 carries out pushing course to blank holder 2, the first promotion column 203,
Second promotion column 204 can play guiding role, ensure that motive force balance pressure on blank holder 2, avoids the edge of raw material plate
The phenomenon that being deformed, generating distortion.
Multiple push rods for being used for the first nitrogen gas spring 602 are offered on die holder 3, the push rod of the second nitrogen gas spring 603 is stretched
The matching hole 301 gone out, matching hole 301 can be oriented to push rod, also can anti-throw-out lever shake, the middle part of die holder 3
Be connected with lower mold core 4, the cross sectional shape in the type face of lower mold core 4 is inverted " v ", lower mold core 4 to the shaping type face of raw material plate into
Row positioning.
The middle part of blank holder 2 offer with the matched slide opening 201 in all sides of lower mold core 4, on the upper surface of blank holder 2
Equipped with the flanging block for enclosing and raising up around slide opening 201 1, the semi-circular recesses 202 of strip structure are offered on flanging block；
Offer rectangle mounting hole on upper mold seat 1, be equipped in mounting hole with 4 matched upper mold core 5 of lower mold core, set in upper mold core 5
Have with 202 matched semi-circular projection 501 of semi-circular recesses, in order to which upper mold core 5 is made fully to coordinate with the flanging block on blank holder 2
It compresses, the height of upper mold core 5 is made to be more than the depth of mounting hole.When blank holder 2 is by the first nitrogen gas spring 602, the second nitrogen gas spring
603 promote move up, flanging block compresses the edge of raw material plate with upper mold core 5, and pass through semi-circular recesses 202 and
The cooperation of semi-circular projection 501 makes the edge of raw material plate generate bending structure so that raw material plate will not move after being compacted
It is dynamic, ensure drawing effect.
During being moved up to blank holder 2 by promotion, make the shifting balance between blank holder 2 and upper mold seat 1,
The both sides of blank holder 2 open up the guide groove 205 there are two rectangular configuration, are equipped on the lower surface of upper mold seat 1 and sliding groove
Matched lead 101, in moving process, the cooperation of guide groove 205 and lead 101 causes blank holder 2 to move up
During so that blank holder 2 is steadily mobile so that during blank holder 2 compresses raw material edge with upper mold core 5
It will not make the situation for being deformed, distorting.In order to make blank holder 2 in moving process, reduce lead 101 and guide groove 205
Between fit clearance, the cross-sectional shape of lead 101 is made to be contacted for rectangular configuration on lead 101 with guide groove 205
Side be equipped with anticollision side plate 102, to protecting effect of the lead 101 in sliding process, at the same reduce lead 101 with
Gap between guide groove 205 is further ensured that blank holder 2 moves up steadily.
During in order to which blank holder 2 being made to compress with upper mold core 5, make to fasten between blank holder 2 and upper mold core 5 tightly, in guarantee
Die holder 1 can be consistent substantially during being moved down with blank holder 2, and raw material plate is avoided to pitch, and be set on blank holder 2
There are multiple limiting plates 206 being distributed on the outside of flanging block, the slot 502 coordinated with limiting plate 206 offered in upper mold core 5,
So that blank holder 2 can be positioned with upper mold core 5 after by limiting plate 206.It is additionally provided on blank holder 2 and locks hook
207, the connecting hole 503 with locking the cooperation of hook 207 is equipped in upper mold core 5, by locking hook 207 and connecting hole 503
Cooperation makes to form locking state between blank holder 2 and upper mold core 5, is further ensured that blank holder 2 compresses raw material with upper mold core 5
Plate.
, it is necessary to which explanation, term " first ", " second " etc. are for only for ease of description and reason in the explanation of the present invention
Solution is not limited technical characteristic using order, significance level.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail in good embodiment, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and scope of technical solution of the present invention, should all be covered at this
Among the right of invention.
Claims (10)
1. a kind of pressure changeable drawing die, including upper mold seat, die holder and blank holder, it is characterised in that：The bottom of the die holder
Mounting groove is offered on face, is equipped with the pressure changeable pushing component that blank holder is promoted to move up in mounting groove, transformation is pushed
Dynamic component includes fixed plate, is spaced in fixed plate and is connected with 3 group of first nitrogen gas spring, between the first nitrogen gas spring of two adjacent groups
Equipped with 2 group of second nitrogen gas spring, the push rod stroke on the first nitrogen gas spring is 9 times of the push rod stroke on the second nitrogen gas spring,
The first nitrogen gas spring of connection, the snorkel of the second nitrogen gas spring are additionally provided in fixed plate；
Multiple push rods for being used for the first nitrogen gas spring are offered on the die holder, the cooperation that the push rod of the second nitrogen gas spring stretches out
Hole is connected with lower mold core in the middle part of die holder, and the cross sectional shape in the type face of lower mold core is inverted " v "；
The matched slide opening in all sides with lower mold core is offered in the middle part of the blank holder, the upper surface of blank holder, which is equipped with, encloses
The flanging block for enclosing and raising up around slide opening one offers the semi-circular recesses of strip structure on flanging block；
Offer rectangle mounting hole on the upper mold seat, be equipped in mounting hole with the matched upper mold core of lower mold core, in upper mold core
Equipped with the matched semi-circular projection of semi-circular recesses.
2. a kind of pressure changeable drawing die according to claim 1, it is characterised in that：The height of the upper mold core is more than peace
Fill the depth in hole.
3. a kind of pressure changeable drawing die according to claim 1, it is characterised in that：The push rod of first nitrogen gas spring
First step is equipped with, the push rod of the second nitrogen gas spring is equipped with second step, and the height of first step is more than first step
Highly.
4. a kind of pressure changeable drawing die according to claim 3, it is characterised in that：It is set on the lower surface of the blank holder
There is corresponding with the first nitrogen gas spring position first to promote column and the second promotion corresponding with the position of the second nitrogen gas spring
Column, wherein the first promotion column is engaged with first step, the second promotion column is engaged with second step.
5. a kind of pressure changeable drawing die according to claim 1, it is characterised in that：The both sides of the blank holder open up
There are two the guide groove of rectangular configuration, the lower surface of upper mold seat is equipped with and the matched lead of sliding groove.
6. a kind of pressure changeable drawing die according to claim 5, it is characterised in that：The cross-sectional shape of the lead
For rectangular configuration, the side contacted on lead with guide groove is equipped with anticollision side plate.
7. a kind of pressure changeable drawing die according to claim 1, it is characterised in that：The blank holder is equipped with multiple equal
Limiting plate of the cloth on the outside of flanging block.
8. a kind of pressure changeable drawing die according to claim 8, it is characterised in that：It is additionally provided with and locks on the blank holder
Hook.
9. a kind of pressure changeable drawing die according to claim 8, it is characterised in that：It offers and limits in the upper mold core
The slot of position plate cooperation.
10. a kind of pressure changeable drawing die according to claim 9, it is characterised in that：The upper mold core is equipped with locking
The connecting hole of hook cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364237.8A CN108057780A (en) | 2017-12-18 | 2017-12-18 | A kind of pressure changeable drawing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364237.8A CN108057780A (en) | 2017-12-18 | 2017-12-18 | A kind of pressure changeable drawing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108057780A true CN108057780A (en) | 2018-05-22 |
Family
ID=62139359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711364237.8A Pending CN108057780A (en) | 2017-12-18 | 2017-12-18 | A kind of pressure changeable drawing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108057780A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740968A1 (en) * | 1995-05-01 | 1996-11-06 | Toyota Jidosha Kabushiki Kaisha | Pressing method and system wherein cushion pin load is detected by load detector for diagnosis for even distribution of blank holding force |
| CN1721098A (en) * | 2004-07-16 | 2006-01-18 | 株式会社小松制作所 | Die cushion device for press machine |
| CN102950185A (en) * | 2012-11-16 | 2013-03-06 | 华中科技大学 | Variable speed and variable blank holder force linked sheet drawing process |
| CN202963201U (en) * | 2012-10-31 | 2013-06-05 | 长城汽车股份有限公司 | Blank drawing die |
| CN203002958U (en) * | 2012-12-14 | 2013-06-19 | 重庆长安汽车股份有限公司 | Vehicle side body drawing die capable of preventing yawing force from producing |
| CN104023868A (en) * | 2011-09-09 | 2014-09-03 | M's株式会社 | Press molding method and press molding device |
| CN204194603U (en) * | 2014-11-11 | 2015-03-11 | 芜湖福祥模具科技有限公司 | A kind of automobile B-pillar inner plate stretching die |
| CN204294762U (en) * | 2014-11-25 | 2015-04-29 | 重庆市天益模具有限公司 | Inner plate of automobile rear wheel cover drawing die |
| CN105642753A (en) * | 2014-11-11 | 2016-06-08 | 芜湖福祥模具科技有限公司 | Automobile B pillar inner plate drawing die |
| CN105855399A (en) * | 2016-06-03 | 2016-08-17 | 昆山威特亿模具有限公司 | Drawing forming die for automotive structural parts |
| CN207787457U (en) * | 2017-12-18 | 2018-08-31 | 重庆安亚模具制造有限公司 | A kind of pressure changeable drawing die |
-
2017
- 2017-12-18 CN CN201711364237.8A patent/CN108057780A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740968A1 (en) * | 1995-05-01 | 1996-11-06 | Toyota Jidosha Kabushiki Kaisha | Pressing method and system wherein cushion pin load is detected by load detector for diagnosis for even distribution of blank holding force |
| CN1721098A (en) * | 2004-07-16 | 2006-01-18 | 株式会社小松制作所 | Die cushion device for press machine |
| CN104023868A (en) * | 2011-09-09 | 2014-09-03 | M's株式会社 | Press molding method and press molding device |
| CN202963201U (en) * | 2012-10-31 | 2013-06-05 | 长城汽车股份有限公司 | Blank drawing die |
| CN102950185A (en) * | 2012-11-16 | 2013-03-06 | 华中科技大学 | Variable speed and variable blank holder force linked sheet drawing process |
| CN203002958U (en) * | 2012-12-14 | 2013-06-19 | 重庆长安汽车股份有限公司 | Vehicle side body drawing die capable of preventing yawing force from producing |
| CN204194603U (en) * | 2014-11-11 | 2015-03-11 | 芜湖福祥模具科技有限公司 | A kind of automobile B-pillar inner plate stretching die |
| CN105642753A (en) * | 2014-11-11 | 2016-06-08 | 芜湖福祥模具科技有限公司 | Automobile B pillar inner plate drawing die |
| CN204294762U (en) * | 2014-11-25 | 2015-04-29 | 重庆市天益模具有限公司 | Inner plate of automobile rear wheel cover drawing die |
| CN105855399A (en) * | 2016-06-03 | 2016-08-17 | 昆山威特亿模具有限公司 | Drawing forming die for automotive structural parts |
| CN207787457U (en) * | 2017-12-18 | 2018-08-31 | 重庆安亚模具制造有限公司 | A kind of pressure changeable drawing die |
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Effective date of registration: 20240409 Address after: Room 2103, Room G001, Building 1, No. 213 Funing Road, Zumiao Street, Chancheng District, Foshan City, Guangdong Province, 528000 (Residence Declaration) Applicant after: Foshan Runqianyu Intellectual Property Service Co.,Ltd. Country or region after: China Address before: 402260 Shuangfu Industrial Park, Jiangjin District, Chongqing Applicant before: CHONGQING ANYA MOULD MANUFACTURING CO.,LTD. Country or region before: China |